Answer:
h20
Explanation:
science, 3 hydrogen and one oxygen make h2o
[tex]H_3O^+[/tex], hydronium ion is the name given to this molecule. Therefore, the correct option is option B among all the given options.
The smallest recognisable unit which which a pure material may be split while retaining its composition and chemical characteristics is a molecule, which is a collection of two or more atoms. Until portions consisting of tiny molecules are reached, the division of a sample for a substance onto progressively smaller parts does not result in a change with respect to its composition as well as its chemical characteristics. [tex]H_3O^+[/tex], hydronium ion is the name given to this molecule.
Therefore, the correct option is option B among all the given options.
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Which transition metals usually form only one monatomic cation? select all that apply.
Zn, Cd, and Ag are transition metals that usually form only one monoatomic cation.
A monatomic cation is a cation made of only one atom.
Cations are positively charged ions, in this example Ag⁺, Cd²⁺ and Zn²⁺.
These cations form only one type of ion, while iron and copper form more than one type of cations.
Iron and copper form cations with different charges (Fe²⁺, Fe³⁺, Cu⁺, Cu²⁺).
It depends on electron configuration which type would be formed.
Electron configuration of zinc atom: ₃₀Zn 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²
Transition metals are elements in the d-block of the Periodic table.
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The ph scale is based on the number of ________ in solution.
a) protons
b) neutrons
c) hydroxyls
d) electrons
The ph scale is based on the number of hydroxyls in the solution.
What are hydroxyls?
Chemistry and biochemistry both use the hydroxy group extensively. The chemical product generated on the largest industrial scale, sulfuric acid, among many other inorganic substances, contains hydroxy groups.
In the dehydration events that form lengthy chains out of simple biological molecules, hydroxy groups take part. A fatty acid's carboxy terminus loses its OH group when it is joined to glycerol to create a triacylglycerol. The carboxy group at the aldehyde end of one sugar loses its OH group when two aldehyde sugars are joined to create a disaccharide. The carboxy group of one amino acid loses the OH when a peptide bond is formed to join two amino acids to form a protein.
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1. The motion of an object is described as 240 mph to the northeast. What form of
motion is being described?
a. Speed
b. Velocity
c. Acceleration
d. None of the above
The form of motion which is described is velocity as it is describing the speed as well as the direction.
What is motion?Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.
Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.
Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic mechanics is based on modern kinematics.
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The atomic number of oxygen is 8. What is the mass number of a oxygen atom with 7 neutrons?.
The atomic number of oxygen is 8. The mass number of an oxygen atom with 7 neutrons is 15.
What is atomic mass?Atomic mass is the average mass of the atom. It is measured in atomic mass units, that is Dalton. The mass number is calculated by the number of neutrons and atomic number.
The atomic number is the number of protons present in the atoms. The atomic number of oxygen is 8
The mass number can be calculated by adding those units
atomic number + number of neutrons
Mass number = 8 + 7 = 15
Thus, the mass number of an oxygen atom with 7 neutrons is 15.
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Which is true?
Oxygen is negative and hydrogen is positive.
Oxygen is negative and hydrogen is negative.
Oxygen is positive and hydrogen is positive.
Oxygen is positive and hydrogen is negative.
The statement oxygen is negative and hydrogen is positive is true.
How to determine charge on an element?
Charge on an element is determined by the position of an element in the periodic table.More precisely,it is determined by an element's electronic configuration.
Elements having one electron in their outermost or valence shell are situated to the left of the periodic table and are positive as they loose their one electron present in valence shell to form cations that are positively charged ions.
Elements having six or seven electrons in their valence shell tend to gain one or two electrons respectively to complete their octet.These elements form anions that are negatively charged ions.
Hydrogen with atomic number 1 has 1 electron in it's valence shell which it looses to acquire a positive charge and hence form a cation .
Oxygen on the other hand,with atomic number 8 has 6 electrons in it's valence shell and thus gains 2 more electrons to complete the octet,and hence gain a negative charge and form an anion.
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You are given the sodium acetate, hcl (1 m), nahco3, and na2co3. determine which of these four you will need and then show the calculations to make a buffer of ph 9.9using the method
You are given the sodium acetate, hcl (1 m), nahco3, and nahco3 we need na2co3
Here pKa Co=310.3⁴ buffer of pH =9.9
Use nahco3, and na2co3 to prepare 100mL of buffer with 0.1M of concentration here we calculate the given salt,
pH=pKa+log[salt]/[acid] 9.9=10.1+log[na2co3]/[nahco3][na2co3]/[nahco3] = 0.63
[na2co3]+[nahco3]=0.1M
0,63[nahco3]+[nahco3]=0.1 [nahco3]=0.0613M
Moles=molarity×volume=0,0613×100/1000=0.0613moles
[na2co3]=0.1-0.0613=0.938M
Moles=0.938M
Calculated moles will be prepared in buffer in 100 ml solution
Moles=mass/molecular weight
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How many ionized amino groups will be found in the tripeptide ser-ala-lys at ph 7?
The four amino acids can come together in any way. 34 x 81 = 81 different combinations are conceivable.
What is ionized amino ?Aspartic acid and glutamic acid are the two examples where the side chain further contains a carboxylic acid group to the one adjacent to the amino group. When the pH is close to neutral (pH 7), these groups get ionised and manifest themselves as the carboxylate anion.
The concentration of H+ ions and acid strength increase in direct proportion to the degree of dissociation (or ionisation). As a result, the degree of an acid's dissociation or ionisation is directly related to the acidity of the acid (stronger acids have lower pH values).
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Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustrating?
Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings illustrates Stabilizing selection.
Stabilizing selection is a natural selection in which stabilized traits are selected rather than any extreme traits by the nature. Nature do not favors any drastic change in the traits over the years.
Stabilizing selection is often confused with or misunderstood as negative or purifying selection.
Stabilizing selection favors intermediate variants promoting survival of the species.
Average phenotype is selected and continuously dominates in coming generations.
This natural selection helps species to adapt stable phenotype for better survival rate.
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A chemist experiments on a molecule with the formula of c5h10o5. this compound is likely a(n) ________.
A chemist experiments on a molecule with the formula of c5h10o5. this compound is likely a(n) carbohydrates.
A molecule with the formula C₅H₁₀O₅ is carbohydrates.
What are Carbohydrates?
The carbohydrates are represented through the chemical system Cₙ(H₂O)ₓ.C denotes carbon within the components with a few water molecules. hence, carbohydrates mean hydrated carbon as it has some water molecules attached.The ratio of carbon, hydrogen and oxygen in carbohydrates is 1:2:1.Glucose is the maximum plentiful and simple carbohydrate.Monosaccharides and polysaccharides are the 2 kinds of carbohydrates.Carbohydrates are biomolecules.they also offer electricity to living things through numerous meals like bread, and rice, and so forth.therefore the molecular method C₅H₁₀O₅ represents carbohydrates.
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What is the immediate effect of hyperventilation (breathing too fast) on the co2co2 concentration in the blood?
The immediate effect of hyperventilation on the CO₂ concentration in the blood is low levels of carbon dioxide in the blood.
Low levels of carbon dioxise makes a person feel light- headed and increases heartbeat and results in shortness of breath.When hyperventilation occurs, the concentration of carbon dioxide decreases in the blood and the protonization of the blood also decreases. Therefore, the H + ions decrease in concentration, which results in the generation of metabolic alkalosis.Respiratory system collaborates by generating hypoventilation, to regulate the metabolic alkalosis. It is also regulated by various other systems. If you exhale more than you inhale, it results in the reduction in carbon dioxide in the body. Hyperventilation upsets the balance of gases as too much CO₂ is removed.If CO₂ levels in the blood drops, pH of the blood is altered resulting in the condition called alkalosis, which makes a person feel weak or faint.To learn more about hyperventilation,
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Which feature is shared by all three-carbon monosaccharides?
The features are shared by all three-carbon monosaccharides, They are all pentoses. In their linear forms, they all contain carbon carboxyl and several hydroxyl functional groups. In their linear forms, they all contain a carbonyl and several hydroxyl functional groups.
Carbon is used in some form in almost every industry in the world. It is used as fuel in the form of coal, methane gas, and crude oil (used to make gasoline). It is used to make all sorts of materials, including plastics and alloys such as steel (a combination of carbon and iron).
Life on Earth cannot exist without carbon. This allows carbon to readily form bonds with other atoms, giving it flexibility in the forms and functions that biomolecules such as DNA and RNA can adopt, and is essential for growth and replication, the defining properties of life. This is partly due to
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The binder found in high-fiber foods that inhibits the absorption of iron and zinc is?
The binder found in high-fiber foods that inhibits the absorption of iron and zinc is oxalic acid Choose raw fruits and vegetables instead of juice, and consume the peels. Alternative fiber sources include whole buckwheat, whole wheat couscous, quinoa, bulgur, wheat germ, chia water seeds, hemp seeds, lentil pasta, and edamame pasta.
Popcorn is a complete grain. Serve it low-fat and without butter for a healthy snack option. It is a white crystalline substance that dissolves colorlessly in water. It got its name from the fact that early researchers obtained oxalic acid from blooming plants of the genus Oxalis, sometimes known as wood-sorrels.
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Why do we emphasize the valence electrons in an atom when discussing atomic properties?
We emphasize the valence electrons in an atom when discussing atomic properties, as they are most accessible to other atoms.
What are valence electrons?The valence electrons are the electrons that are present in the outer shell of the atoms. These electrons are free for making bonds with the electrons of other atoms.
Electrons are joined with other electrons to make a compound. These electrons are shared by or gained by other atoms.
Thus, when discussing atomic qualities, we focus on the valence electrons in an atom since they are the most receptive to other atoms.
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The reaction of benzaldehyde with acetone and sodium hydroxide produces ____________ This is an example of ____________ reaction.
The reaction of benzaldehyde with acetone and sodium hydroxide produces DibenzalacetoneThis is an example of an aldol condensation reaction.
A physical reaction is a reaction in which a change in the physical properties of matter or substances occurs. Physical properties include density, mass, and volume. The definition of a physical reaction is a reaction in which molecules undergo molecular rearrangements but do not change chemically.
A response, although technically a reaction, takes into account the desired outcome of the interaction. Reactions can produce positive or negative results, but reactions are designed to produce positive or negative results. To react is emotional, to react is emotional intelligence.
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What multiplicity would you expect in a 1h nmr spectrum for the indicated proton(s)? (1 pts)
Triplet multiplicity would expect in a 1h NMR spectrum for the indicated proton(s).
The spectrum is the invisible radio frequencies that radio signals pass through. These signals let you make phone calls from your mobile device, tag your friends on call an Uber, and get directions to your destination, all from your mobile device.
Spectrum management is the art and science of managing the use of the radio spectrum to minimize interference and ensure that the radio spectrum is used in the most efficient manner possible for the public good. For USDOT, this focuses on supporting safe, efficient, and economical transportation. Spectrum Networks is a suite of news and sports networks owned and operated by Charter Communications, Inc.
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You place 10.00 mL of water in a graduated cylinder and add a 15.0 g sample of iron to the water. The new water level is 11.91 mL. What is the density of the iron?
The density of the iron, given the data from the question is 7.85 g/mL
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
How to determine the density of the ironThe following data were obtained from the question:
Volume of water = 10 mLVolume of wate + iron = 11.91Volume of 1ron = 11.91 - 10 = 1.91 mLMass of iron = 15 gDensity of iron =?The density of the iron can be obtained as follow:
Density = mass / volume
Density of iron = 15 / 1.91
Density of iron = 7.85 g/mL
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what are two ways that cmpounds ar differnent from the elements that form them
Answer: A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.
Explanation:
chlorhexidine and alexidine are: group of answer choices used to treat local hypoplasia. used widely in metallic salts. used in mouthrinses and are effective against plaque formation. chemicals present in metallic dust, which industrial workers may inhale. used in prophylaxis jets.
Chlorhexidine and alexidine are: used in mouthrinses and are effective against plaque formation.
Chlorhexidine is a disinfectant and antiseptic. It is used for preventing dental plaque, treating yeast infections of the mouth and cleaning wounds.
Chlorhexidine interacts with components of toothpaste and forms salts of low solubility and antibacterial activity.
Alexidine is an antimicrobial agent, used in mouth washes as antiplaque cleaner. It is better for use than chlorhexidine because it is relatively non-toxic
Chlorhexidine and alexidine were synthesized in 1950s.
They inhibit a dental plaque formation by 70%.
Dental plaque is a biofilm of microorganisms that grows in the mouth.
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How many significant figures are in each measurement?
a.
b. 143 kg
c. 8.75 x 10 -2 g
d. 0.074 m
e. 1.072 cm
f. 0.05730 m
g. 8765 L
h. 11 soccer players
i. 40.007 m
Answer:
Explanation:
b. 3 sig figs
c. 3 sig figs
d. 2 sig fig
e. 4 sig fig
f. 4 sig fig
g. 4 sig fig
h. 2 sig fig
i. 5sig fig
The anaerobic process of splitting glucose and forming two molecules of pyruvic acid.
The anaerobic process of splitting glucose and forming two molecules of pyruvic acid is called 'glycolysis.'
The word glycolysis means 'glucose splitting' and this is what happens throughout the process.
During glycolysis, enzymes are used to split one molecule of glucose into two molecules of pyruvate (pyruvic acid).
This process produces end products which include two molecules of ATP and two molecules of NADPH as well as water.
As this is an 'anaerobic process' which means it doesn't need oxygen for the process.
The process of glycolysis also takes place inside the cytoplasm and occurs in both aerobic and non-aerobic organisms.
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Hydrogen and helium, the two main constituents of the sun, are both ______ elements.
The two main constituents of the sun, are both lightweight elements.
What is constituents of the sun?Helium and hydrogen make up the majority of the sun's mass (He). The sun is made up of 92.1% hydrogen and 7.9% helium by mass. Less than 0.1 percent of the mass of the sun is made up of different metals. The surface of the sun is around 10,340 degrees Fahrenheit hot (5,726 degrees Celsius).
The majority of the sun's emissions come from particles like neutrinos that travel beyond the light the sun's surface emits and can't be seen with ordinary spectroscopic instruments. As a result, to identify these particles, specialised equipment were needed, such as the Super Kamiokande (Kamioka Observatory, Japan), which has incredibly sensitive light sensors. These particles provided evidence that nuclear fusion processes were taking place in the Sun's core, which is what caused their emission.
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If 53.5 g of c3h8 are burned in the presence of 15.0 g of oxygen to produce 23.3 g of co2. How many grams of water will be produced? c3h8 o2 co2 h2o
Mass of water is 45.2 grams.
Overall chemical equation for reaction of combustion a propane (C₃H₈):
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
m(C₃H₈) = 53.5 g; mass of the propane
m(O₂) = 15.0 g; mass of oxygen
m(CO₂) = 23.3 g; mass of carbon dioxide
m(H₂O) = ?; mass of water
Conservation of matter states that the mass of the reactants have to be equal to the mass of the products.
m(C₃H₈) + m(O₂) = m(CO₂) + m(H₂O)
53.5 g + 15.5 g = 23.3 g + m(H₂O)
m(H₂O) = 69.0 g - 23.3 g
m(H₂O) = 45.2 g; mass of water
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What is the atomic number for an element whose mass number is 78, which contains 36 neutrons per atom?
based on the information above and periodic trends, which of the following is the best hypothesis regarding the oxide(s) formed by rb?
The best hypothesis regarding the oxide(s) formed by Rb: Rb will form only Rb₂O, Rb₂O₂ and RbO₂.
Rubidium electron configuration:
₃₇Rb 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s¹; one valence electron is 5s¹ orbital.
Alkaline metals (group 1), in this example rubidium, have lowest ionizations energy and easy remove valence electrons (one electron), they are most reactive metals.
Alkaline metals have oxidation number +1.
The alkaline metals react with oxygen to form different oxides.
Rubidium like other alkaline metals, form oxide, peroxide and superoxide.
Rb₂O is rubidium oxide, it is a yellow solid
Rb₂O₂ is rubidium peroxide, it is produced when rubidium stands in air
RbO₂ is rubidium superoxide, it is a black solid
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What is the correct symbol for an ion containing 24 protons, 27 neutrons, and 21 electrons?
The appropriate designation for an ion with 24 protons, 27 neutrons, and 21 electrons is [^51 Cr24].
How to represent an atom with atomic number and mass?
The smallest component of ordinary stuff that makes up a chemical element is an atom. Each neutral or ionized atom makes up a solid, liquid, gas, or type of plasma. Atoms are very small, with an average diameter of 100 picometers.
Symbolical representation is :
[ Xz^A] or [^A Xz]
Where,
A = Mass , X = atom, Z = Atomic number.
The quantity of protons and neutrons in an atom's nucleus is referred to as its mass number.
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An atom has 13 protons, 12 neutrons and 13 electrons in an atom. it loses 2 electrons to form an ion. find the number of protons, and electrons in the ion. also, find the charge of the ion.
(Tell as soon as possible) *Thank you *
Answer:
If there are 13 protons (positive charges), how many electrons are there in a neutral atom? Expert Answer 1)) given total number of protons =13 and electron =12 . For atom to be neutral total number of protons should be equal to total number of electrons.
Explanation:
Bam added 5.42 g of cscl to 35.31 ml of h2o. calculate the concentration of bam's solution in units of g solute/100 g solvent. mwcscl= 168.36 g/mol mwh2o= 18.015 g/mol density of water= 0.9975 g/ml
Bam's solution, 5.42 g of CsCl mixed with 35.31 ml of H2O, has a concentration of 15.3882 g CsCl/100 g H2O.
Concentration, in chemistry, is defined as the amount of solute in a particular amount of solvent or solution. Some of the most common ways to express concentration includes molarity, mass-to-mass and mass-to-volume.
To solve for the concentration of Bam's solution in g solute/100 g solvent, solve for the mass of the solvent first.
To solve for the mass of the solvent, use the density and volume:
mass solvent = density x volume
mass solvent = 0.9975 g/ml x 35.31 ml
mass solvent = 35.221725 g
Solving for the concentration of Bam's solution in g solute/100 g solvent, where the mass of the solute CsCl is 5.42 g:
concentration = mass solute/ 100 g solvent
concentration = 5.42 g/ (35.221725/100)
concentration = 15.38822985
concentration = 15.3882 g CsCl/100 g H2O
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define magnetic field
Answer:
Explanation:
Magnetic field is the magnetism charge around a magnetic body
When we double the quantities of reactants and products in a reaction, what happens to the value of the equilibrium constant?.
When we double the quantities of reactants and products in a reaction, the value of the equilibrium constant remains the same.
K = [P]/[R]
where,
[P] is the concentration of the product.
[R] is the concentration of reactant.
If we double the quantities of reactants and products in the final concentration it'll become
[R]2=2×[R]1 and [P]2=2×[P]1
Now at initial stage
K1 = [P1]/[R1]
at final stage after doubling the products
K2=[P2]/[R2]
Putting the given values
K2/K1 = 2×[P1]×[R1]/2×[R1]×[P1]
K2/K1=2/2
K2/K1=1
K2=K1
So, the value of equilibrium constant remains same.
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How many grams are in 34,358 mg?
"answer with 1 decimal place and no unit
Answer:
34.4
Explanation:
You would divide the mg by 1000 to get the number of grams.